Electrical device



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'c LET G. Foam-:scusi ELECTRICAL DEVICE original Filed oct, 24, 1917 2 Sheets-Sheet 2 INVENTOR Char/es Lefbrtescu@ 1 f AoRNEY giise :cuit entier.; and neef D ii. circ modified l con ne terminals :iurce 3 oretire torce is s the other terininois of e. is connected. A 4 "fievinw eidgenerator L irsnoroeter is adapted to be ncoy ci shuntoround motor T that energy troni 'tl'ic source 3 of' se tor "Tie generator i and tor'f/ ere disposed in n cesingg 8 magneti' ble materie). for purpose ot sliieid seine 'jroin the iniiuence of the certo. messie-tic icld.' The 'generetor 5 1s c .v constructed with no magnetic ine ls invite insign-ctie circuit in order that reino; tue seme. or o is provided a d estimated cerny that is l icy reeeter e,

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o reetwely sensitive v 1v. n1 @53.1 Vil silvery r einen e @fencing i?, gyn' Er mutiny perform et no etten# titrev cirbe zero.

c v Y i t rf?, prc'riue, predetermined 'if alone; tl e circuit 9, series-Wound generators lh substzintiz'uly as iiei'einiieforc set forth.

" i src adopted tti drivenl n'xotors and ere de- 53 proporreoson ot circuit to i. v'zus the` annif; enA es omgerdine; t5, is connected in series with sire to increasing inductor 30.

essere@ points. The generators [1S and 19 :1re

adapted to generate energy in proportion to Vthe energy dissipated by reason of the resistence of the' respective portions of the circuit and are driven at constant speed by shunt-wound motors that are supplied tive force. 'By this arrangement, the working current that traverses the circuit 15 is not dissipated in the resistance of the circuit and may allj'oe used in eective Work. Consequently, the circuit 15 may be mede relatively long, and the quality of the cionomunicution thereon may be vgreatly im proved. y

itis desired to compensateI for the leak ege resistance in the circuit 15,v reactzmce coils, 22 are connected across the conductors i6 and 17 at predetermined points and the central points of the coils 22 are connected, through' relatively small co'ndensers 23, to ground. A .series-Wound generator .9A is connected in shunt relation to each of the condensers 23 and is so designed tliat'it develops energy in proportion to thelenkegre energy through that portion of the circuit.

The generators 24 are actuated at a constant speed by motors 25 that :1re supplied with' energy from a source 26 of 'electromotivef force, Since'a plurality of grounding; devices are used, the generators 24 are designed. to supply only the loss of energy that is caused by the leakage loss in the particular portion of the circuit to which itis connected.

if it is desired to protect an inteiligence transmission circuit Q ?,such as shown in Fig. 4i, 'from the detrimental effects oi an extra'- neous circuit, such-as n power tru: smss'ion line (not shown)..wlicli induces cu., rents of a ld iier'ent frequency in the same, 'if grroride parllelresonunt circuits 28 severally comprising a condenser 29, :i serially connected indu'ctor 30 und :m indnctor 3l' connected in parallel to both the condenser 29 and the These rcsoimnt circuits are connected in series with the circuit 2" at pren determined points and :rre so tuned osito carry circulatingcurrents .of only the treqliency-of the power-transmission line or other extraneous circuit. Whereby'snid currents ure prevented from flowing in the iutelintime-transmission line. series-wound generator 32 is connected in I circuit with earch ot the resonant circuits und is adopted to generate energy in accordance lwith energy fromsources 2l' of electromof illien it necssery to protect the circuit 2T troni, adjacent transmission iines, vthe inductance of tbe generators 82 may be used for the saine purpose as the 'Weil known Pupin coiis. to supply 'die energy that is dissipated-in the resoniint circuits, the generators do not function to change the pbase-angular relation of the current traversing the circuit.4 Other resonant circuits maybe connected, at predetermined points, betveen the con dnctor 2' and ground 'to iiter currents of objectionable frequencies out ot the circuit. 'The circuits 33 iney be An'evicted with seriesivound generators Si, as liereinbefore set forth, for compensating tor tlie loss of energy therein.

'ihe measuring apparatus herein. shown and described is cle-iined in niymdivisionai application, Serial No. l, tiled July 24, i925, 'for eiect icei measuring" ldevices.

` illiy invention is not iirnited the particul: r systems iiinstratefi. it may be applied to various devices Without departing from the spiiit und scope of the inveinion;l as set jiorti in the appended cieiins.

i claim as invention:

i. Tiieconibinntion with an cicctric circuit, otinecns connected to tile circuit for permitting on f currents having certain 4U clinructe 1' i from. the characteristics o? no niain current to traverse the suine :ind ineens resiiionsive to the scid currents for ff energy to tiie circuit in cnt in'dai'icc t i.

15 '"liie combi: .tion with an eicctrio oircuit, ci means coi'iiiec tbc circuit tra* versed by t," lionne; predetermined 'troni the characterent and iueensnctuated seid currents for uient to the circuit.

I. 'iuc combination with un electric circuit, oi? insane concer i to iie circuit the: is traversed liy curre other than tile nulin current in said circuit, und means for supplying current to said circuit in accordance with tlie currents traversing seid means.

4. Tilo coinbixnitioi'i ruth un electric circuit, ot' ineens connected to flic circuit that is traversed by currents other the main current in said cuit, and a series generntor ioi' suppij," current to said circuit in :u fcordance with Le current traversing vsaid ineens.

Tile conilciuation with eiectrc. cir

However, When it is desiredV cuit, of means connected to the circuit that is traversed by current other than the main current inl said circuit, and independent elecand an .undesired frequency, of Inca-ns trafY versed by said currents of undesired frequency and inherently responsive thereto for supplying a proportionate amount of, energy to said circuit. l

8. The combination Wit-l1 an electric circuit traversed bv currents oit' a desired frequency and an undesired frequency, of means conretarded by i nected thereto and selectively responsive to i the currents of undesired frequency, and booster means 'for inherently responding to the current-s traversing said first-mentioned means and generating, at alltirnes, an. nndesirocl-fieqijiency voitave which is substantially equal and opposite to the resistance drop encountered by the undesirable-frequency currents in said first-mentioned means. i t i 9. The combination with an electric circuit subject to variable currents, of a series- Wound booster generator having its magnetic circuit made Wholly or non-magnetic material.

l0. The combination with-an eiectric oircuit subject to variable currents, of a. series- Wound booster generator having its magnetic circuit made n'hoiiy ot' non-1nagnetic mate-- rial, and 'ineens for driving seid generator et a substantially constant speed.

1i. The combination Wi 'h e sourceof varieble electromotive forces varying from zero to relatively small values, ot a circuit includ` ing a translating' device connected to said source, and means for, in effect., reducing the resistance or' seid circuit substantially to zero, said moans cornprisingc series-vvouncl generator liai'fiiog.,r its magnetic circuit mudo wholly of non-magnetic n'iaterini.

12. The combination with a main circuit impressed vvitli electroinotive forces of a predetermined frequency, of a parallel-resonzintcircuit comprising paraliellconnected inductance and capacitance devices tuned to said 'frequency and connected in series with said main circuit, said resonant circuit including,r some resistance, und means for-substan'tiaiiy neutralizing the resistance drop in scid parelielfresonant circuit.

13. The combination with a line carrying desired currents and aiso currents of an uns desirable frquency,

cuit compmsmg ser-1a ance :md ca undesirable allel across said line to a resonant circuit including some resistance, 

